Energy Bill Splitter Calculator

Split utility bills fairly among roommates.

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Bill Splitter

Enter the total bill, number of people, and room sizes.

Cost per person
$0
Split method: Equal

Worked example

With the default inputs shown below, this calculator returns the following results:

InputValue
Total utility bill ($)$300
Number of people3
Split methodBy room size ratio
Room sizes (sq ft, comma separated)200,150,100
ResultValue
Cost per person$133.33

Values shown are produced by this page in your browser; change any input to update them.

How to use the Bill Splitter
  1. Total utility bill ($) — default $300
  2. Number of people — default 3
  3. Split method — default By room size ratio
  4. Room sizes (sq ft, comma separated) — default 200,150,100
  5. Press Calculate to update the results instantly.

Frequently asked questions

Split equally if usage is similar, by room size if rooms differ a lot, or by headcount if some rooms are shared. Write the rule down before the first bill.
It is fairer than equal splits when room sizes differ, but ignores who runs the heating hardest. Many share houses use a mix: half equally, half by size.
That person uses more daytime heat and power. A common adjustment is a fixed monthly contribution on top of the normal split.

Sources & references

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